Transaction not yet indexed

21C2ckASPUBsSYZmme8MxHJJqv9zb6Qaqdg9dkpC2ZsJKb23vBewfZsUraK8b4Js2CPP8Rn376G5YNt8C4o777Sq

The transaction signature is valid but not yet indexed by this RPC node, or the transaction failed before inclusion.